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UNITED STATESl PATENT Genion.

GEORGE BAIRD, OE THE UNITED STATES NAVY.

STEAM-GENERATOR.

SPECIFICATION forming part of Letters Patent No. 540,808, dated June 11,1895.

Application filed December 26, 1893. Renewed December 20, 18 94. SerialNo, 532,507. (No model.)

To all whom it may concern.-

Be it known that I, GEORGE W. BAIRD, an engineer and officer oftheUnited States Navy, residing at Washingtom in the District of Columbia,have made certain new and useful Improvements in Steam Generators orEvaporators for Making Pure Water for Feeding Boilers and otherPurposes, of which the following is a specification. l

My invention relates to that class of evaporators in which steam isgenerated from sea or other impure water by means of steam introducedincoils or tubes within the generator. The steam generator being connectedto, a condenser, the steam is condensed and the water of condensation isdrawn'off to be applied to any of its many uses.

The object of my invention is to so arrange the coils in multiple orseries that they may be readily cleaned or scaled-without removal orwhere the generator is limited to space the coils may be removed withoutremoving the outer casing.

The invention consists in connecting the tubes or coils either in seriesor multiple close to the steam inlet and outlet chambers which arelocated near the periphery of the casing thereby leaving space forexamining or cleaning the coils by entering through the manhole in thecasing.

Referring to the drawings, Figure l is a vertical section through thegenerator, showing the steam inlet and outlet chambers on the casing.Eig. 2 is a horizontal section on line a: a: of Fig. l, showing therelative position of the coils with that of the casing. Fig. 3 is amodified form showing the steam inlet and outlet chambers on the bottomof the generator and near the periphery of the casing. Fig. 4 is adetailedsectional View showing separate caps or plugs to thesteam-chamber by the removal of which the nuts can be removed from theends of the coils. Fig. 5 is a detailed sectional view showing a dierentform of coils, which are placed in multiple upon the cap which containsthe inlet and outlet chambers; and Figs. 6 and 7, details in sectionshowingthe coils in series, that shown in the latter figure beingfastened to the casing.

A is the casing; B, the coils; C, the steam.

inlet chamber and D the outlet chamber;

The sevchambers may be made to communicate with each other by means ofpipes E or cast with the casing or base E as at Gr.

H. is a man hole and I a pipe which carries the generated steam to thecondenser.

In Fig. l the coils are attached to the casing, and the steam chamber,into which the ends of the coil enter is covered with a bonnet K whichis similar in form with that of Figs. 3 and 6, except the chambers areon the base of the generator.

In Figs. 4 and 7 separate caps or plugs L are employed to gain accesstothe nuts on the end of the coil.

In Fig. the coils are secured to a removable header M whichis alsoprovided with a bonnet K. The coils shown in this figure are insubstantiallythe same position as those of Figs. 1 and 2 as'to thisadvantage and that' is they can be removed through the manhole or withthebonnet as desired and especially when the location of the generatorheaders cannot be removed. In the operation ofthe evaporator it isalternately lled and emptied of the water thereby allowing thecoils toeX- pand and contract which loosens the scale adhering to them.

I may also apply coils the tubes of which are fiat in cross sectionwhich are more sensitive to expansion by the change of temperature.

Steam from the boiler can be admitted to any of the inlet chambers as atN which Will readily find its way to all of them and to the coils intothe outlet chamber, where the water of condensation VVmay be drawn offin the well known manner. The steam thus i-ntroduced will heat'thewater, whiclrhas beenpreviously introduced in the well known manner, andgenerate steam which is carried to the condenser through the pipe I,wherel the water of condensation is pumped into the boiler or used forother purposes.

It is not necessary to give a full detail of the operation of theevaporator as it is old in the arts and my invention consists in animprovement upon the same such as found in patent granted to me August23, 1887, No.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is

1. In a steam generator or evaporator` the combination ofthe casing, thesteam inlet and outlet chambers on the periphery of thel case with thesteam coils in multiple or series connecting with the steam inlet andoutlet charnbers substantially, as shown for the purpose set forth.

2. In a steam generator or evaporator the combination of the casing, thesteam inlet and outlet channels near the periphery of thecase andconcentric to each other with the steam coils in multiple or seriesconnecting with the steam inlet and outlet chambers substantially asshown and described.

3. In a steam generator or` evaporator the combination of the casingprovided with the steam'inlet and outlet chambers ou its pealiases1Connecting the inlet and outlet chamber substantially as shownanddescribed.

5. In a steam generator or evaporator the i combination ofthe casingprovided with steam inle. chambers, communicating with each other withtubes or coils connecting the inlet and outlet chambers and a manholeabove the coils substantially as shown and described. GEORGE W. BAIRD.I'Nitnesses J. M. FOWLER, WM. I-I. DELACY.

